forked from VowpalWabbit/vowpal_wabbit
-
Notifications
You must be signed in to change notification settings - Fork 3
/
simple_label.cc
163 lines (138 loc) · 4.33 KB
/
simple_label.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
#include <cstring>
#include <float.h>
#include <math.h>
#include <stdio.h>
#include "cache.h"
#include "accumulate.h"
#include "best_constant.h"
using namespace std;
char* bufread_simple_label(shared_data*, label_data* ld, char* c)
{
memcpy(&ld->label, c, sizeof(ld->label));
c += sizeof(ld->label);
memcpy(&ld->weight, c, sizeof(ld->weight));
c += sizeof(ld->weight);
memcpy(&ld->initial, c, sizeof(ld->initial));
c += sizeof(ld->initial);
count_label(ld->label);
return c;
}
size_t read_cached_simple_label(shared_data* sd, void* v, io_buf& cache)
{
label_data* ld = (label_data*) v;
char *c;
size_t total = sizeof(ld->label)+sizeof(ld->weight)+sizeof(ld->initial);
if (buf_read(cache, c, total) < total)
return 0;
c = bufread_simple_label(sd, ld,c);
return total;
}
float get_weight(void* v)
{
label_data* ld = (label_data*) v;
return ld->weight;
}
char* bufcache_simple_label(label_data* ld, char* c)
{
memcpy(c, &ld->label, sizeof(ld->label));
c += sizeof(ld->label);
memcpy(c, &ld->weight, sizeof(ld->weight));
c += sizeof(ld->weight);
memcpy(c, &ld->initial, sizeof(ld->initial));
c += sizeof(ld->initial);
return c;
}
void cache_simple_label(void* v, io_buf& cache)
{
char *c;
label_data* ld = (label_data*) v;
buf_write(cache, c, sizeof(ld->label)+sizeof(ld->weight)+sizeof(ld->initial));
c = bufcache_simple_label(ld,c);
}
void default_simple_label(void* v)
{
label_data* ld = (label_data*) v;
ld->label = FLT_MAX;
ld->weight = 1.;
ld->initial = 0.;
}
void delete_simple_label(void*)
{
}
void parse_simple_label(parser*, shared_data*, void* v, v_array<substring>& words)
{
label_data* ld = (label_data*)v;
switch(words.size()) {
case 0:
break;
case 1:
ld->label = float_of_substring(words[0]);
break;
case 2:
ld->label = float_of_substring(words[0]);
ld->weight = float_of_substring(words[1]);
break;
case 3:
ld->label = float_of_substring(words[0]);
ld->weight = float_of_substring(words[1]);
ld->initial = float_of_substring(words[2]);
break;
default:
cerr << "malformed example!\n";
cerr << "words.size() = " << words.size() << endl;
}
count_label(ld->label);
}
label_parser simple_label = {default_simple_label, parse_simple_label,
cache_simple_label, read_cached_simple_label,
delete_simple_label, get_weight,
nullptr,
sizeof(label_data)};
void print_update(vw& all, example& ec)
{
if (all.sd->weighted_examples >= all.sd->dump_interval && !all.quiet && !all.bfgs)
{
all.sd->print_update(all.holdout_set_off, all.current_pass, ec.l.simple.label, ec.pred.scalar,
ec.num_features, all.progress_add, all.progress_arg);
}
}
void output_and_account_example(vw& all, example& ec)
{
label_data ld = ec.l.simple;
all.sd->update(ec.test_only, ec.loss, ld.weight, ec.num_features);
if (ld.label != FLT_MAX && !ec.test_only)
all.sd->weighted_labels += ld.label * ld.weight;
all.sd->weighted_unlabeled_examples += ld.label == FLT_MAX ? ld.weight : 0;
all.print(all.raw_prediction, ec.partial_prediction, -1, ec.tag);
for (size_t i = 0; i<all.final_prediction_sink.size(); i++)
{
int f = (int)all.final_prediction_sink[i];
if (all.lda > 0)
print_lda_result(all, f,ec.topic_predictions.begin,0.,ec.tag);
else
all.print(f, ec.pred.scalar, 0, ec.tag);
}
print_update(all, ec);
}
void return_simple_example(vw& all, void*, example& ec)
{
output_and_account_example(all, ec);
VW::finish_example(all,&ec);
}
bool summarize_holdout_set(vw& all, size_t& no_win_counter)
{
float thisLoss = (all.sd->weighted_holdout_examples_since_last_pass > 0) ? (float)(all.sd->holdout_sum_loss_since_last_pass / all.sd->weighted_holdout_examples_since_last_pass) : FLT_MAX;
if (all.span_server != "")
thisLoss = accumulate_scalar(all, all.span_server, thisLoss);
all.sd->weighted_holdout_examples_since_last_pass = 0;
all.sd->holdout_sum_loss_since_last_pass = 0;
if (thisLoss < all.sd->holdout_best_loss) {
all.sd->holdout_best_loss = thisLoss;
all.sd->holdout_best_pass = all.current_pass;
no_win_counter = 0;
return true;
}
if ((thisLoss != FLT_MAX) || (isfinite(all.sd->holdout_best_loss))) // it's only a loss if we're not infinite when the previous one wasn't infinite
no_win_counter++;
return false;
}